@book{25306,
	author = {Friedrichs, K. O.},
	title = {Mathematical aspects of the quantum theory of fields /},
	publisher = {Interscience Publishers,},
	year = {c1953.},
	address = {New York :},
	note = {Parts 1-5 published in Communications on pure and applied mathematics, v. 4-6, 1951-53.}
}